ENH: helper methods to convert strings into PixelTypes

Modules/Wrappers/ApplicationEngine/include/otbWrapperComplexOutputImageParameter.h

@@ -85,6 +85,10 @@ public:
   /** Static method to convert pixel type into string */
   static std::string ConvertPixelTypeToString(ComplexImagePixelType type);
 
+  /** Convert a string into a ComplexImagePixelType (returns false if the
+   *  conversion fails) */
+  static bool ConvertStringToPixelType(const std::string &value, ComplexImagePixelType &type);
+
   /** Return true if a filename is set */
   bool HasValue() const ITK_OVERRIDE;
 

Modules/Wrappers/ApplicationEngine/include/otbWrapperOutputImageParameter.h

@@ -86,6 +86,10 @@ public:
   /** Static method to convert pixel type into string */
   static std::string ConvertPixelTypeToString(ImagePixelType type);
 
+  /** Converts a string into a pixel type (returns false if the conversion
+   *  fails) */
+  static bool ConvertStringToPixelType(const std::string &value, ImagePixelType &type);
+
   /** Return true if a filename is set */
   bool HasValue() const ITK_OVERRIDE;
 

Modules/Wrappers/ApplicationEngine/src/otbWrapperComplexOutputImageParameter.cxx

@@ -73,6 +73,18 @@ ComplexOutputImageParameter::ConvertPixelTypeToString(ComplexImagePixelType type
   return ret;
 }
 
+bool
+ComplexOutputImageParameter::ConvertStringToPixelType(const std::string &value, ComplexImagePixelType &type)
+{
+  if (value == "cfloat")
+    type = ComplexImagePixelType_float;
+  else if (value == "cdouble")
+    type = ComplexImagePixelType_double;
+  else
+    return false;
+  return true;
+}
+
 void ComplexOutputImageParameter::InitializeWriters()
 {
   m_ComplexFloatWriter = ComplexFloatWriterType::New();

Modules/Wrappers/ApplicationEngine/src/otbWrapperOutputImageParameter.cxx

@@ -98,6 +98,28 @@ std::string OutputImageParameter::ConvertPixelTypeToString(ImagePixelType type)
   return ret;
 }
 
+bool
+OutputImageParameter::ConvertStringToPixelType(const std::string &value, ImagePixelType &type)
+{
+  if (value == "uint8")
+    type = ImagePixelType_uint8;
+  else if (value == "int16")
+    type = ImagePixelType_int16;
+  else if (value == "uint16")
+    type = ImagePixelType_uint16;
+  else if (value == "int32")
+    type = ImagePixelType_int32;
+  else if (value == "uint32")
+    type = ImagePixelType_uint32;
+  else if (value == "float")
+    type = ImagePixelType_float;
+  else if (value == "double")
+    type = ImagePixelType_double;
+  else
+    return false;
+  return true;
+}
+
 void OutputImageParameter::InitializeWriters()
 {
   m_UInt8Writer = UInt8WriterType::New();